CB-WP-0012-T05: evidence — tier L deleted its own deliverable

CB-EV-0010. The pass's own verdict on the tier it ran at.

Full-weight review withdrew the capability port the declaration was made
to build. A tier-S pass has no step 2 and would have shipped it, and
stage 2 would have found it unimplementable — which is what CommitWindow
is already on record in this repo for doing.

Two corrections of the survey's own numbers, compounding:
  AM-4a headroom       3,750 claimed -> 92,798 measured   (25x)
  cheapest windowed  480,501 claimed -> 140,079 measured  (3.4x)
  headline ratio         128x        -> 1.5x              (85x)

The prediction from CB-EV-0009 §4 held: meta budget reads 0%, published
in advance and unfalsified.

A correction that is now a pattern: CB-EV-0009 reported CB-WP-0011 at
45 responses / $4.23 / 0.094; final is 71 / $7.02 / 0.099. Still the
cheapest pass, so the conclusion stands. But that is the second
consecutive evidence file to report its own pass's cost low — a pass
cannot measure its own cost, and one quoting its own is quoting a floor.

First priced tier comparison on a single subject: 0.123 $/response at L
against 0.099 at S — 24% more, for a pass that found the two errors
above. On one data point, step 2 is cheap.

Not shipped, and said plainly: the emitted JavaScript has never been
executed. The socket loop is tested end to end with synthetic HTTP and
the page is asserted against as a parsed document, but no browser engine
has run it. INTENT stage 1 therefore stays open even though all four of
its named deliverables now exist.

SH-3 reads 0.0% for a sixth consecutive pass and remains the oldest
unargued number in the project.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

workplans/CB-WP-0012-render-port.md

@@ -2,7 +2,7 @@
 id: CB-WP-0012
 kind: product
 title: "Stage 1, second slice: the rendering port"
-status: todo
+status: done
 ---
 
 # Purpose
@@ -184,7 +184,7 @@ commit.
 
 ```task
 id: CB-WP-0012-T04
-status: todo
+status: done
 priority: high
 ```
 
@@ -196,11 +196,30 @@ feed back into validation; a drag that proposes a move must go through the
 same command path a CLI move takes. The inspector's coverage gate is the
 precedent for the control this needs.
 
+**Done 2026-08-02.** `crates/cb-render-html` (doc/input/serve) and
+`tools/cb-play/src/hotseat.rs`, behind `cb-play --serve PORT`. Per
+ADR-0007 D2 there is **no `cb-render-api` and no `cb-render-null`**.
+
+Marginal AM-4a cost, measured rather than claimed: **0 new third-party
+crates** (23 before, 23 after). AM-4a unmoved at 246,250.
+
+Eight mutations, each red for its stated reason. Two results worth more
+than the six that behaved:
+
+| control | result |
+|---|---|
+| a field present in neither list | fired **for real on the first run** — `ground_choices.*.choice`, `ground_choices.*.problem`, and `players.*.blame_from`, the last being an **empty vector**, a leaf path a fully-populated fixture would never produce |
+| `Sec-Fetch-Site` arm removed | **stayed green** — the `Origin` check caught it independently. Both had to go before the control bit; a control that passes for an unintended reason has not been demonstrated |
+
+**Never executed: the emitted JavaScript.** The socket loop is tested
+end to end with synthetic HTTP and the page is asserted against as a
+parsed document, but no browser engine has run `SCRIPT`.
+
 ## Task: evidence
 
 ```task
 id: CB-WP-0012-T05
-status: todo
+status: done
 priority: medium
 ```
 
@@ -209,3 +228,24 @@ falsifiable prediction from CB-EV-0009 §4 that the trailing-3 meta share
 drops to 0% this pass, SH-3 at 0.0% for a sixth pass, and whether tier L
 at full weight produced anything the rolled-down pass would have missed —
 the CHAOS window's second data point, and the first from a non-override.
+
+**Done 2026-08-02.**
+[CB-EV-0010](../evidence/CB-EV-0010-render-port.md).
+
+- **Tier L deleted its own deliverable.** Review withdrew the port. A
+  tier-S pass has no step 2 and would have shipped it.
+- **The prediction held: meta budget reads 0%**, published in advance and
+  unfalsified.
+- **A correction, and a pattern.** CB-EV-0009 reported CB-WP-0011 at
+  `45 responses / $4.23 / 0.094`; final is `71 / $7.02 / 0.099`. Still the
+  cheapest pass, so its conclusion stands. But this is the **second**
+  consecutive evidence file to report its own pass's cost low — a pass
+  cannot measure its own cost, and every evidence file quoting its own is
+  quoting a floor.
+- **Priced tier comparison, first ever on one subject**: 0.123 $/response
+  at L against 0.099 at S — 24% more, for a pass that found errors of 25×
+  and 85×.
+- **SH-3 at 0.0% for a sixth pass.** Oldest unargued number in the
+  project; owed a declaration of its own.
+- **INTENT stage 1 stays open** — all four deliverables now exist, and
+  none of the browser half has ever been run.